The American Civil Liberties Union filed a lawsuit Monday seeking to force the U.S. government to disclose details of its foreign electronic surveillance program and what protections it provides to Americans whose communications are swept up.
The lawsuit, filed in U.S. District Court in New York, came three days after the ACLU lost a bid to block a separate program that collects the phone calls of millions of Americans.
The latest lawsuit seeks information related to the use of Executive Order 12333, which was signed in 1981 and governs surveillance of foreign targets.
Under the order, the National Security Administration is collecting "vast quantities" of data globally under the order's authority, "inevitably" including communications of U.S. citizens, the lawsuit said.
The lawsuit cites "recent revelations," an apparent reference to reports about U.S. spying activities in the wake of leaks by former NSA contractor Edward Snowden.